[PATCH V3] sama5d3x: fix HSMC MODE register offset and add TIMINGS register

[Matteo Fortini]

As we discussed on the list, I used a single struct and two different config functions

[PATCH 1/2] sama5d3x: fix HSMC MODE register offset and add TIMINGS
[PATCH 2/2] sama5d3x: HSMC NAND initialize TIMINGS and import values